Controller.



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PATENTED OCT. 15, 1907.

O. E. LORD.

CONTROLLER. urmoulox FILED AUG. so, 1905 xnnwnn In zo, 1907.

2 SHEETS-SHEET 2.

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' motors regulated by means of resistance.

UNITED sTATns PATENT OFFICE.

CHARLES EQLoRD, oFL NoRwoonomo, AssrGNoR To THE BULLo'CK ELECTRICMANUFACTURING COMPANY, A CoRPoRATxoNoF omo.V

CONTROLLER.

Specification o f Letters Patent.

Patented Oct. 15, 1907.

Application nea A-m 30,1906, smal 110.270,34?. aumamy so, 1907.' Beal l.314,124..

To all whom it may Be it knownthat I, CHARLES E. Loan, a citizen of theUnited States, residing at Norwood, in the county of Hamilton and Stateof Ohio, have invented certain new and useful Improvements inControllers, oi which the following is a full, clear, and exactspecification.

My invention relates to improvements in controllers for electric motorsand particularly to an improved form of interlocking mechanism betweenthe main switch and the cut-out switch of a railway controller.

In the operation of a series-parallel controller forrailway or otherpurposes, it is desirable to provide means for cutting out one or moreof the motors regulated by the main switch of the controller and at thesame time leave the motor circuits in such condition that the remainingmotor or motors .may be regulated rheostatically, or otherwise, by themain switch. With series-parallel controllers as ordinarily constructed,the main switch should be arrested in a predetermined position,preferably in its final series position, when a motor is cut out, andthe remaining motor or The stop for arresting the main switch preventsthe latter from moving into the parallel positions of the controller andthereby prevents damage due to improper connections and short-circuits.

The object of my invention is to produce a simple form of interlockingmechanism between the main switch and the motor cut-out means, and to soconstruct and arrange the same that it is readily accessible andindependently controlled from the exterior of the controller casing.

The invention therefore comprises ilnprovements in the construction andarrangement of the interlocking mechanism between the main switch andthecutout switch, which will be hereinafter explainedand more specificallypointed out in the appended claims.

In the accompanying drawings, which illustrate preferred embodiments ofmy invention, Figure 1 is a front elevation of the lower part of arailway controller equipped`with my improvement; Fig. 2 is a diagram'ofmotor connections made by said controller; Fig. 3 is a sectional planview on line 3-3 of Fig. 1; Fig. 4 is a detail of theinterlockmechanism, being a partial sectional elevation on line 4 4 ofFig. l, looking toward the right; Fig. 5 is a slightly modified form ofthe device shown in Fig. 4; and Fig. 6 'is a detail side elevation ofthe exterior of the lower part of the controller casing.

Referring now to Fig. 2, in which I have illustrated the connectionsmade by a series-parallel controller to which my improved interlockingmechanism is applicable, the motors are indicated at M M", M* and M,

the reversing switch at RS, the cut-out at O and the main cylinder ofthe controller in development at C.

The contact fingers of the controller are designated v 'lhe cut-outswitch 0 comprises the fixed contact fingers .17 m 21 inclusive and theromaine Contact' segments 22, 23, and 24.

AIn the operation of the controller herein illustrated, with the cut-outswitch in the position shown, when the main drum is moved into its firstoperative position, indicated by the vertical line 1-1, a circuit iscompleted through the'controlled motors which may be. traced as follows;from trolley T, through blow-out magnet coil B, contact finger 16,thence through contact segments 16* and 15, contact 15, resistance R,contact finger 8, segments 8 and 10, finger 10, contact fingers 18 and17, and segment 22 of cut-ont switch O, conductor 25 to reversing switchRS, through contacts on same and through fields fl and f2 and armaturesal and a2 of motors Ml and M2 in parallel to conductor 26, thencethrough contact fingers Z) and 19 and segment 23 of cut-out switch Otocontact finger 6 of main switch, thence through segments 6'* and 7,contact finger 7, through armatures a3 and o4 and fields f 3 and f*ofmotors M and M* in parallel, through contacts on reversing switch RSto conductor 27 and,

to ground at G. Considering the motors M and M2 as a single motor andthe motors M and M* as a singlel motor, said motors are connected inseries with each other and inseries with the regulating resistance R inthis positionof the main switch. A.s the main switch `is moved forwardthe resistance R is cut out step by step until the motor pairs areconnected 'm series withclock-wise direction the pair of motors M and Mare f cut out of circuit and the remaining motors are connected incircuit so that they may be regulated rheostatically bythe mainV switch.When the cut-out switch is moved in a clock-wise direction the pair ofmotors M' and M* are cut out of circuit and thel remainin g motors areconnected so as to be regulated rheostatically by the main switch. Whenany motor, or

los.

45 v-49 is reciprocablymounted inthe bearing 51l-astencd pair of motors,is cut out ofcircu-it vit is desirable to arrest 'same in its fifth orinal series position when either motor or pair of motors is cut out ofcircuit. To' this end I provide an improved interlocking medianismbetween the cut-out switchand the main switch which will now bedescribed. i 4

Referring to` the remaining figures o the drawings,

it will be seen that the main switch C and thecut-out switch O aremounted .in the controller casing D, the shaft 28 of the cut-out switchbeing preferably arranged at right angles to the shaft" 29 of the mainswitch andprojocts through thecontroller casing at .Thelmterl end of theshaft 28 isirregular shaped to receive areoperating handle, preferablythe standard reversing switch handle. Surrounding said shaft 28 outsidesaid casing isa collar 3l carrying the index finger 32 to theprojections 33, 34, and'35 indicating the positions of the cutoutswitch. f The controller casingadjaeent" to said projecting shaft isvprovided with a'notched locking flange. 36 adapted .to coact withtheoperating handle in a well known manner. .This'arrangement is clearlyshown in Fig. 6.. The' cut-out switchis mount-r ed within the projectingcasing 37 through the'back 38 of which projects said shalt 28 which hasmounted thereon the collar-39 formed with theI recess 40 and the flanges41. -Said collar `preferably `fastened to shaft 28 bypin 42 and isadapted to coaet with the independ- `gently`controlled stop for the mainswitchA in a manner vstep bearing 43 is al collar 44v carrying the lug45 corre` spending to the final seresiposition of thecontroller or tovany other position in which it is desired to. mest lso the main switchwhen the cut-dut switch is operated.

The stop which is adapted to be moved into the path of said lug 45-isthe arm 46.. This arm Ltti-fiume one arm oi the bell-crank lever- 47"pivotedat 48, the other arm' 46* of said lever 47 being biurcated toreceivethe vertical extension 49Jof the. controlling rod 49. Said rod'49extends through the controller casing and isl .provided with anoperating linob 50, (see Fig. 3). Rod

to the' under. ysidefof the casingl'or the cut-out switch. To holdthe-stop controlling 'mechanism -ir'niily in its position, I provide a`springhnger' 52 to. engage 4thenotches 53` and54 formed in thecontrolling rod 49. As an additional guide forsaid stop controllingmechanf ism I providethe U shaped member 5.5l to constrain themovexnentsof the vertical projections 49". In the modification shown-in Figi, 5,the flanges 4l have been In the operationoi my invention, col 'delingthestop in its` normal position, the main switch may b'e movedreely through`its entire range of movement, but the cut-out switchis lockedagainstmovement since the extension49 lies in the lrecess 40= harmed in thecollar 39. Bel'ore the cut-out switch may be operated l to cut out amotor, or pair of motors, it is necessary to operate the independentlycontrolled stop, for the main switch. This is accomplished by graspingthe knob 50 and moving the rod. 49 outwardly into the position shown inthe gures. This movement throws lthe arm or stop 46 into thepath of lug'45 and/removes the extension 49* from recess 40 and unlocks thevcutf'out switch. The cut-out switch may then be/moved'ns desired, butthe main switch cannot be moved' beyond 70 the operative positiondetermined bythe position 'of the lug 45. The flanges 41 upon the.collaril'mayor may not be employed as desired.' When employed they actto prevent the stop 46 from being thrown back '-while the cut-out switchis' in a position to vcut out" a "75 4motor.V v' r.

I am'aware that a mechanical series-stop has been,

employed 'heretofore to limitthe movement of a series parallelregulating drum in a motor controller/such for instance as shown in thepatent to W, B.-Po 'tter, reissue- 80 No. 12,241, July 19, 1904, and Itherefore de not claim such a series-stop broadly. `Howev`er,in theappendedl f claims I aim to cover all modifications of my inventionwhich do not depart from its spirit andscope.` ,n

Having thus described my invention, what claim yas v85,- n'ew and desireto. secure by Letters Patent is-" i 1. In combination, switch torregulatlng.two 'or more electric motors ln series and thenchanging 4themto parallel relationship, means for controlling" said regulating switch,a. switch 'for cut-tlnz'out each of.' the motors, means, 90 forcontrolllng .the cut-out swltch, Interlock-lng mechanism between thecut-out switchl and -the'regulati'ng switch, and independent controllingmeans 'for sald interlocking mechanism. f L 'I 2. In combination, aswltch'for connecting two motors 95 either ln series or ln parallel, s.cut-out-swltch for cutting out one' motor and for connecting oneterminal of the other motor to the opposite llne, a stop for theseriesparallel switch, and means, independent offthc cut-out switch Aforcontrolling the' operation of said stop.

n3. In combination, a controller casing containing a serlesparallelswitch; vevent-out s`wltch, and a stop for the seriesparallel switch,and independent controlling means accessible from the exterior of saidcasing for-the cut-ont switch and the stop respectively. t -I l4. Incomblnatloxna maln swltch-for regulating two -`clectllc motors in seriesdnd then changing them-toparallel, a cnt-'ont switch for euttlng ou-teither of the two motors, a stop for arresting the main switch in aprede; termlned position, and independent meansfor controlllnz saidstop. t

5. In combination, a main switch for regulating two electr-lc motors lnseries and then changing them to palallel, a cut-out switch for cuttlngout either of theftwo motors, a stop for arresting the main switch in aprede-1115 termlned posl'tlon, means independent of the cut-out switchfor controlling sald` stop, and means connected with -the stopcontrolling means forglocllng thecubont switchv aga-lust movement whenthev stpls in an inoperative posltlon. 'f 6. Incomblnatlon, a mainswitch for regulating twov eleotrlc motors by means of s. resistance andthen changlng them from serles to parallel, a cut-out swltchfor cuttingout either of the two` motors, a stop llmltlng the movement ot the mainswitch to-those polnts'at which 125 the 'regulatlon by means of thereslstanc' ls effected, and Independent' means for controlling theoperation of said stop. v

7., la combination, a malnswltch for regulating two orl more electricmotors ln series and then changlng` them to parallel, means for cuttingout either of the motors,

a stopfor arresting the main switch ln a predetermined posltlon when thecut-out mea-ns ls ln s. position to cut out one ot the motors,Independent means for'control-llng the-ope1atlon-ofthe stop, and meanscarried by the stop 135 controlling means for preventing a movement o tsaid cutout means from its inoperative position until the stop has lbeenmoved into its operatlve post-tion.

8. ln combination, a pair of motors,'a main switch for regulating saidmotors in series and then chang-lng them` to parallel, a cut-out switchfor cutting ont either ot said motors, a stop for arresting the mainswitch in a pre- .determined position, megns independent of the cut-outswitch for operatingifsid stop, and an interlock between ,the cut-outswitch and said stop which renders it necessary for the stop to bethrown into its operative position before the cutout switch can be movedto cnt ont a motor.

9.v In combination, a main switch for regulating two or more electricmotors, means for cutting y@uit either of the motors, a stop forarresting the main switch-in a predetermined position when the cut-outmeans is in s position to cut out one'ot the motors, independent meansfor operating the stop, and means tor locking the stop operating meansin position when the cut-out means is in a position to cut out a motor;

Inl testimony whereof I aiiix my signature, in the presence of twowitnesses.

CHARLES E. LORD.

